Mr. Jugal Kishore invested a certain sum at simple interest for 4 years such that $$\frac{3}{7}$$ of the sum was invested at 7% p.a $$\frac{2}{5}$$ of the sum at 9% p.a. and the remaining sum at 11% p.a. If the total interest received is ₹11,880, then the total sum invested is:

A

₹30,000

B

₹35,000

C

₹38,000

D

₹32,000